<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        a{
            text-decoration: none;
            color: black;
        }
        .diva{
           text-align: center;
        }
        .aa{
            font-size: 20pt;
            margin-left: 10px;
        }
        .aa:hover{
            text-decoration: underline;
        }
    </style>
</head>
<body>
    <div>
        <div style="width: 100%;height:115px;background-color:darkgray;">
            <div class="diva">
                <a href="" class="aa">首页</a>
                <a href="" class="aa">导航</a>
                <a href="" class="aa">html</a>
                <a href="" class="aa">java</a>
                <a href="" class="aa">jasasfs</a>
            </div>
        </div>
        <div style="width: 15%;height: 480px;background-color:beige;float: left;">
            
        </div>
        <div style="width: 100%;height: 480px;background-color: rgb(134, 148, 142);">
            
        </div>
        <div style="width: 100%;height: 120px;background-color: rgb(123, 111, 111);float: left;">
            <label style="text-align: center;"><h1>底部</h1></label>
        </div>
    </div>
</body>
</html>